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https://www.readbyqxmd.com/read/29327192/towards-a-better-control-of-the-wastewater-treatment-process-excitation-emission-matrix-fluorescence-spectroscopy-of-dissolved-organic-matter-as-a-predictive-tool-of-soluble-bod5-in-influents-of-six-parisian-wastewater-treatment-plants
#1
Angélique Goffin, Sabrina Guérin, Vincent Rocher, Gilles Varrault
The online monitoring of dissolved organic matter (DOM) in raw sewage water is expected to better control wastewater treatment processes. Fluorescence spectroscopy offers one possibility for both the online and real-time monitoring of DOM, especially as regards the DOM biodegradability assessment. In this study, three-dimensional fluorescence spectroscopy combined with a parallel factor analysis (PARAFAC) has been investigated as a predictive tool of the soluble biological oxygen demand in 5 days (BOD5) for raw sewage water...
January 11, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29311541/yolk-sac-macrophage-progenitors-traffic-to-the-embryo-during-defined-stages-of-development
#2
C Stremmel, R Schuchert, F Wagner, R Thaler, T Weinberger, R Pick, E Mass, H C Ishikawa-Ankerhold, A Margraf, S Hutter, R Vagnozzi, S Klapproth, J Frampton, S Yona, C Scheiermann, J D Molkentin, U Jeschke, M Moser, M Sperandio, S Massberg, F Geissmann, C Schulz
Tissue macrophages in many adult organs originate from yolk sac (YS) progenitors, which invade the developing embryo and persist by means of local self-renewal. However, the route and characteristics of YS macrophage trafficking during embryogenesis are incompletely understood. Here we show the early migration dynamics of YS-derived macrophage progenitors in vivo using fate mapping and intravital microscopy. From embryonic day 8.5 (E8.5) CX3CR1+ pre-macrophages are present in the mouse YS where they rapidly proliferate and gain access to the bloodstream to migrate towards the embryo...
January 8, 2018: Nature Communications
https://www.readbyqxmd.com/read/29216122/delay-line-coherent-pulse-stacking
#3
Henrik Tünnermann, Akira Shirakawa
Ultrafast fiber amplifiers are usually limited in terms of pulse energy and peak power due to fiber damage and nonlinearities. On the other hand, fiber amplifiers are very energy efficient. To take advantage of this efficiency, but still scale the pulse energy, coherent combining and pulse stacking have become the method of choice. Here we show how to directly and symmetrically stack up the pulses from an oscillator chain, using delay lines and phase preshaping of a 48 MHz, 1.5 μm master oscillator. This method avoids the need for high-power low-loss dumpers as in passive stack and dump cavities and, compared to divided pulse amplification (DPA), it eliminates the need for splitting pulses and pulse picking and, thus, optimally utilizes the available seed power...
December 1, 2017: Optics Letters
https://www.readbyqxmd.com/read/29191430/oculomotor-abnormalities-in-children-with-niemann-pick-type-c
#4
James Blundell, Steven Frisson, Anupam Chakrapani, Paul Gissen, Chris Hendriksz, Suresh Vijay, Andrew Olson
Niemann-Pick type C (NP-C) is a rare recessive disorder associated with progressive supranuclear gaze palsy. Degeneration occurs initially for vertical saccades and later for horizontal saccades. There are studies of oculomotor degeneration in adult NP-C patients [1, 2] but no comparable studies in children. We used high-resolution video-based eye tracking to record monocular vertical and horizontal eye movements in 2 neurological NP-C patients (children with clinically observable oculomotor abnormalities) and 3 pre-neurological NP-C patients (children without clinically observable oculomotor abnormalities)...
November 16, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/29183128/performance-evaluation-of-the-q-exactive-hf-x-for-shotgun-proteomics
#5
Christian D Kelstrup, Dorte B Bekker-Jensen, Tabiwang N Arrey, Alexander Hogrebe, Alexander Harder, Jesper V Olsen
Progress in proteomics is mainly driven by advances in mass spectrometric (MS) technologies. Here we benchmarked the performance of the latest MS instrument in the benchtop Orbitrap series, the Q Exactive HF-X, against its predecessor for proteomics applications. A new peak picking algorithm, a brighter ion source and optimized ion transfers enable productive MS/MS acquisition above 40 Hz at 7500 resolution. The hardware and software improvements collectively resulted in improved peptide and protein identifications across all comparable conditions, with an increase of up to fifty percent at short LC-MS gradients, yielding identification rates of more than one thousand unique peptides per minute...
November 29, 2017: Journal of Proteome Research
https://www.readbyqxmd.com/read/29161774/building-trophic-specializations-that-result-in-substantial-niche-partitioning-within-a-young-adaptive-radiation
#6
Luz Patricia Hernandez, Dominique Adriaens, Christopher H Martin, Peter C Wainwright, Bert Masschaele, Manuel Dierick
Dietary partitioning often accompanies the increased morphological diversity seen during adaptive radiations within aquatic systems. While such niche partitioning would be expected in older radiations, it is unclear how significant morphological divergence occurs within a shorter time period. Here we show how differential growth in key elements of the feeding mechanism can bring about pronounced functional differences among closely related species. An incredibly young adaptive radiation of three Cyprinodon species residing within hypersaline lakes in San Salvador Island, Bahamas, has recently been described...
November 21, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29152789/automatic-differential-analysis-of-nmr-experiments-in-complex-samples
#7
Laure Margueritte, Petar Markov, Lionel Chiron, Jean-Philippe Starck, Catherine Vonthron-Sã nà Cheau, Mã Lanie Bourjot, Marc-Andrà Delsuc
Liquid state NMR is a powerful tool for the analysis of complex mixtures of unknown molecules. This capacity has been used in many analytical approaches: metabolomics, identification of active compounds in natural extracts, characterization of species, and such studies require the acquisition of many diverse NMR measurements on series of samples. While acquisition can easily be performed automatically, the number of NMR experiments involved in these studies increases very rapidly and this data avalanche requires to resort to automatic processing and analysis...
November 20, 2017: Magnetic Resonance in Chemistry: MRC
https://www.readbyqxmd.com/read/29135952/integrated-pest-management-of-coffee-berry-borer-in-hawaii-and-puerto-rico-current-status-and-prospects
#8
Luis F Aristizábal, Melissa Johnson, Suzanne Shriner, Robert Hollingsworth, Nicholas C Manoukis, Roxana Myers, Paul Bayman, Steven P Arthurs
The coffee berry borer (CBB), Hypothenemus hampei, is the most significant insect pest of coffee worldwide. Since CBB was detected in Puerto Rico in 2007 and Hawaii in 2010, coffee growers from these islands are facing increased costs, reduced coffee quality, and increased pest management challenges. Here, we outline the CBB situation, and summarize the findings of growers, researchers, and extension professionals working with CBB in Hawaii. Recommendations for the Integrated Pest Management (IPM) program for CBB in Hawaiian Islands and Puerto Rico include: (1) establish a CBB monitoring program, (2) synchronize applications of insecticides with peak flight activity of CBB especially during the early coffee season, (3) conduct efficient strip-picking as soon as possible after harvest and perform pre-harvest sanitation picks in CBB hotspots if needed, (4) establish protocols to prevent the escape of CBB from processing areas and when transporting berries during harvest, and (5) stump prune by blocks...
November 14, 2017: Insects
https://www.readbyqxmd.com/read/29079454/the-adenosine-a2a-receptor-agonist-t1-11-ameliorates-neurovisceral-symptoms-and-extends-the-lifespan-of-a-mouse-model-of-niemann-pick-type-c-disease
#9
Antonella Ferrante, Antonella Pezzola, Andrea Matteucci, Antonella Di Biase, Lucilla Attorri, Monica Armida, Alberto Martire, Yijuang Chern, Patrizia Popoli
Niemann-Pick C is a fatal neurovisceral disorder caused, in 95% of cases, by mutation of NPC1 gene. Therapeutic options are extremely limited and new "druggable" targets are highly warranted. We previously demonstrated that the stimulation of the adenosine A2A receptor (A2AR) normalized the pathological phenotype of cellular models of NPC1. Since the validation of A2ARs as a therapeutic target for NPC1 can be obtained only conducting studies in in vivo models of the disease, in the present paper, the effects of two agonists of A2ARs were evaluated in the mouse model Balb/c Npc1(nih), hereafter indicated as NPC1-/-...
October 25, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/29043470/comprehensive-analysis-of-nmr-data-using-advanced-line-shape-fitting
#10
Markus Niklasson, Renee Otten, Alexandra Ahlner, Cecilia Andresen, Judith Schlagnitweit, Katja Petzold, Patrik Lundström
NMR spectroscopy is uniquely suited for atomic resolution studies of biomolecules such as proteins, nucleic acids and metabolites, since detailed information on structure and dynamics are encoded in positions and line shapes of peaks in NMR spectra. Unfortunately, accurate determination of these parameters is often complicated and time consuming, in part due to the need for different software at the various analysis steps and for validating the results. Here, we present an integrated, cross-platform and open-source software that is significantly more versatile than the typical line shape fitting application...
October 2017: Journal of Biomolecular NMR
https://www.readbyqxmd.com/read/29039932/annotation-a-computational-solution-for-streamlining-metabolomics-analysis
#11
Xavier Domingo-Almenara, J Rafael Montenegro-Burke, H Paul Benton, Gary Siuzdak
No abstract text is available yet for this article.
November 3, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29023073/reproductive-biology-of-sardinella-sp-sardinella-aurita-and-sardinella-maderensis-in-the-south-of-morocco
#12
Ayoub Baali, Hajar Bourassi, Samira Falah, Wahbi Abderrazik, Khalid Manchih, Khadija Amenzoui, Ahmed Yahyaoui
BACKGROUND AND OBJECTIVE: Sardinella sp. has gained much attention lately because of its biomass increase, which might be the result of climatic changes occurring across the Atlantic sea. Little information is known about reproduction of these species particularly in the Moroccan Atlantic area. The objective of the this study was to explore some aspects of the reproductive biology of Sardinella in the South of Atlantic Moroccan coast. MATERIALS AND METHODS: Monthly samples were collected during the period between February, 2015 and January, 2016 in the area between Cape Boujdor and Cape Blanc...
2017: Pakistan Journal of Biological Sciences: PJBS
https://www.readbyqxmd.com/read/28977750/data-independent-mass-spectrometry-approach-for-screening-and-identification-of-dna-adducts
#13
Jingshu Guo, Peter W Villalta, Robert J Turesky
Long-term exposures to environmental toxicants and endogenous electrophiles are causative factors for human diseases including cancer. DNA adducts reflect the internal exposure to genotoxicants and can serve as biomarkers for risk assessment. Liquid chromatography-multistage mass spectrometry (LC-MS(n)) is the most common method for biomonitoring DNA adducts, generally targeting single exposures and measuring up to several adducts. However, the data often provide limited evidence for a role of a chemical in the etiology of cancer...
November 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28926221/fourier-transform-ms-and-closed-path-multireflection-time-of-flight-ms-using-an-electrostatic-linear-ion-trap
#14
Eric T Dziekonski, Joshua T Johnson, Kenneth W Lee, Scott A McLuckey
An electrostatic linear ion trap (ELIT) has been configured to allow for the simultaneous acquisition of mass spectra via Fourier transform (FT) techniques (frequency measurement) and via time-of-flight (TOF; time measurement). In the former case, the time-domain image charge derived from a pick-up electrode in the field-free region of the ELIT is converted to frequency-domain data via Fourier transformation (i.e., FT-ELIT MS). In the latter case, the time difference between ion injection into the ELIT and ion detection after release from the ELIT using a microchannel plate (MCP) enables the acquisition of multireflection time-of-flight mass spectra (MR-TOF MS)...
October 17, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28890673/navigating-freely-available-software-tools-for-metabolomics-analysis
#15
REVIEW
Rachel Spicer, Reza M Salek, Pablo Moreno, Daniel Cañueto, Christoph Steinbeck
INTRODUCTION: The field of metabolomics has expanded greatly over the past two decades, both as an experimental science with applications in many areas, as well as in regards to data standards and bioinformatics software tools. The diversity of experimental designs and instrumental technologies used for metabolomics has led to the need for distinct data analysis methods and the development of many software tools. OBJECTIVES: To compile a comprehensive list of the most widely used freely available software and tools that are used primarily in metabolomics...
2017: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28862997/a-novel-optically-transparent-rf-shielding-for-fully-integrated-pet-mri-systems
#16
C Parl, A Kolb, A M Schmid, H F Wehrl, J A Disselhorst, P D Soubiran, D Stricker-Shaver, B J Pichler
Preclinical imaging benefits from simultaneous acquisition of high-resolution anatomical and molecular data. Additionally, PET/MRI systems can provide functional PET and functional MRI data. To optimize PET sensitivity, we propose a system design that fully integrates the MRI coil into the PET system. This allows positioning the scintillators near the object but requires an optimized design of the MRI coil and PET detector. It further requires a new approach in realizing the radiofrequency (RF) shielding. Thus, we propose the use of an optically transparent RF shielding material between the PET scintillator and the light sensor, suppressing the interference between both systems...
September 1, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28843027/lc-ms-smrm-method-development-and-validation-of-different-classes-of-pain-panel-drugs-and-analysis-of-clinical-urine-samples
#17
M Athar Masood, Timothy D Veenstra
Urine Drug Testing (UDT) is an important analytical/bio-analytical technique that has inevitably become an integral and vital part of a testing program for diagnostic purposes. This manuscript presents a tailor-made LC-MS/MS quantitative assay method development and validation for a custom group of 33 pain panel drugs and their metabolites belonging to different classes (opiates, opioids, benzodiazepines, illicit, amphetamines, etc.) that are prescribed in pain management and depressant therapies. The LC-MS/MS method incorporates two experiments to enhance the sensitivity of the assay and has a run time of about 7 min...
August 26, 2017: Basic & Clinical Pharmacology & Toxicology
https://www.readbyqxmd.com/read/28833398/assessment-of-time-to-glucose-peak-during-an-oral-glucose-tolerance-test
#18
LETTER
Adam Hulman, Daniel R Witte, Dorte Vistisen, Kristine Faerch
No abstract text is available yet for this article.
August 21, 2017: Clinical Endocrinology
https://www.readbyqxmd.com/read/28830233/investigating-and-analyzing-three-cohorts-of-mushroom-poisoning-caused-by-amanita-exitialis-in-yunnan-china
#19
J Sun, H-J Li, H-S Zhang, Y-Z Zhang, J-W Xie, P-B Ma, C Guo, C Y Sun
Amanita exitialis is a lethal mushroom found in China. Knowledge regarding taxonomic characterization, toxin detection, general poisoning conditions, clinical manifestations, laboratory examinations, and clinical treatments for this species is currently lacking. We investigated three A. exitialis mushroom poisoning cohorts in Yunnan Province in 2014 and 2015, involving 10 patients. Mushroom samples were identified by morphological and molecular studies. Ultra performance liquid chromatography-electrospray ionization tandem mass spectrometry was used to detect the peptide toxins in the mushroom samples...
January 1, 2017: Human & Experimental Toxicology
https://www.readbyqxmd.com/read/28783153/pecan-library-free-peptide-detection-for-data-independent-acquisition-tandem-mass-spectrometry-data
#20
Ying S Ting, Jarrett D Egertson, James G Bollinger, Brian C Searle, Samuel H Payne, William Stafford Noble, Michael J MacCoss
Data-independent acquisition (DIA) is an emerging mass spectrometry (MS)-based technique for unbiased and reproducible measurement of protein mixtures. DIA tandem mass spectrometry spectra are often highly multiplexed, containing product ions from multiple cofragmenting precursors. Detecting peptides directly from DIA data is therefore challenging; most DIA data analyses require spectral libraries. Here we present PECAN (http://pecan.maccosslab.org), a library-free, peptide-centric tool that robustly and accurately detects peptides directly from DIA data...
September 2017: Nature Methods
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